The following facts have been gathered about an EMC Data Domain implementation:
– Retention policy is 28 days
– Backups start at 6 P.M. and finish by 4 A.M.
– Backup schedule is full on Monday; incremental every other day
– First full backup size = 150 TB
– Reduction rate on first full backup = 5x
– Subsequent reduction rate on full backups = 15x
– Daily change rate = 10%
– Incremental reduction rate = 25x
When installed, the EMC Data Domain cleaning schedule will be left at the default settings. Assuming that the first backup is taken on a Monday, what is the minimum disk requirement for the Data Domain system?
A. 67.2 TB
B. 63 TB
C. 74.4 TB
D. 78 TB
Answer: C
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